Optical transmitter module and endoscope

Abstract

Provided are an optical transmitter module and an endoscope that can be more easily downsized with a more stable configuration.The optical transmitter module includes an image sensor, a laser element, a laser driver circuit, an optical fiber, heat dissipation wiring, electric signal wiring, and a layered substrate. The image sensor, the laser element, the laser driver circuit, at least a part of the optical fiber, at least a part of the heat dissipation wiring, at least a part of the electric signal wiring, and the layered substrate are fixed to each other with a molding agent. The endoscope includes the optical transmitter module described above.

1 . An optical transmitter module comprising:
 an image sensor, a laser element, a laser driver circuit, an optical fiber, a heat dissipation wiring, an electric signal wiring, and a layered substrate, wherein   the image sensor, the laser element, the laser driver circuit, at least a part of the optical fiber, at least a part of the heat dissipation wiring, at least a part of the electric signal wiring, and the layered substrate are fixed to each other with a molding agent.   
     
     
         2 . The optical transmitter module according to  claim 1 , wherein
 the optical transmitter module comprises a first cap member made of glass, and   the first cap member includes:   a first through hole that accommodates at least a part of the optical fiber; and   a recess that accommodates the laser element and the laser driver circuit.   
     
     
         3 . The optical transmitter module according to  claim 2 , wherein
 the first cap member further includes a second through hole that accommodates at least a part of the heat dissipation wiring.   
     
     
         4 . The optical transmitter module according to  claim 2 , wherein
 the first cap member includes a cutout portion that covers only a part of the heat dissipation wiring in the circumferential direction.   
     
     
         5 . The optical transmitter module according to  claim 2 , wherein the first cap member does not cover the heat dissipation wiring. 
     
     
         6 . The optical transmitter module according to  claim 2 , wherein
 a diameter of the optical fiber changes along an axial direction, and   a diameter of the first through hole changes along an axial direction depending on a change in the diameter of the optical fiber.   
     
     
         7 . The optical transmitter module according to  claim 1 , wherein
 the optical transmitter module comprises a second cap member having a tubular shape, and   the image sensor, the laser element, the laser driver circuit, at least a part of the optical fiber, at least a part of the heat dissipation wiring, at least a part of the electric signal wiring, and the layered substrate are disposed inside the second cap member, and   the molding agent is filled inside the second cap member.   
     
     
         8 . The optical transmitter module according to  claim 1 , wherein the layered substrate includes an intermediate layer having a cavity. 
     
     
         9 . An endoscope including the optical transmitter module according to  claim 1 .